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EFM32: Add LFA and LFB clock support

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This commit is contained in:
Gregory Nutt 2014-10-21 10:45:33 -06:00
parent c688cda22a
commit d39eb3ade7
2 changed files with 20 additions and 0 deletions
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10
configs/efm32-g8xx-stk/include/board.h
View File

@ -56,6 +56,7 @@
* - 4-32 MHz High Frequency Crystal Oscillator (HFXO)
* - 32.768 kHz Low Frequency RC Oscillator (LFRCO)
* - 32.768 kHz Low Frequency Crystal Oscillator (LFXO)
* - 1KHz Ultra Low Frequency RC Oscillator (ULFRCO)
*
* The device boots with 14 MHz HFRCO as the HFCLK source.
*/
@ -67,6 +68,7 @@
#define BOARD_HFXO_FREQUENCY 32000000 /* 32MHz crystal on board */
#define BOARD_LFRCO_FREQUENCY 32768 /* Low frequency oscillator */
#define BOARD_LFXO_FREQUENCY 32768 /* 32MHz crystal on board */
#define BOARD_ULFRCO_FREQUNCY 1000 /* Ultra low frequency oscillator */
/* HFCLK - High Frequency Clock
*
@ -110,9 +112,13 @@
* LFRCO is disabled from reset. The selection is configured using the LFA
* field in CMU_LFCLKSEL. The HFCORECLK/2 setting allows the Low Energy A
* Peripherals to be used as high-frequency peripherals.
*
* Use _CMU_LFCLKSEL_LFA_DISABLED to disable.
* ULFRCO is a special case.
*/
#define BOARD_LFACLKSEL _CMU_LFCLKSEL_LFA_LFXO
#undef BOARD_LFACLK_ULFRCO
#define BOARD_LFACLK_FREQUENCY BOARD_LFXO_FREQUENCY
/* LFBCLK - Low Frequency B Clock
@ -123,9 +129,13 @@
* LFRCO is disabled from reset. The selection is configured using the LFB
* field in CMU_LFCLKSEL. The HFCORECLK/2 setting allows the Low Energy B
* Peripherals to be used as high-frequency peripherals.
*
* Use _CMU_LFCLKSEL_LFA_DISABLED to disable
* ULFRCO is a special case.
*/
#define BOARD_LFBCLKSEL _CMU_LFCLKSEL_LFB_LFXO
#undef BOARD_LFBCLK_ULFRCO
#define BOARD_LFBCLK_FREQUENCY BOARD_LFXO_FREQUENCY
/* PCNTnCLK - Pulse Counter n Clock

10
configs/olimex-efm32g880f128-stk/include/board.h
View File

@ -56,6 +56,7 @@
* - 4-32 MHz High Frequency Crystal Oscillator (HFXO)
* - 32.768 kHz Low Frequency RC Oscillator (LFRCO)
* - 32.768 kHz Low Frequency Crystal Oscillator (LFXO)
* - 1KHz Ultra Low Frequency RC Oscillator (ULFRCO)
*
* The device boots with 14 MHz HFRCO as the HFCLK source.
*/
@ -67,6 +68,7 @@
#define BOARD_HFXO_FREQUENCY 32000000 /* 32MHz crystal on board */
#define BOARD_LFRCO_FREQUENCY 32768 /* Low frequency oscillator */
#define BOARD_LFXO_FREQUENCY 32768 /* 32MHz crystal on board */
#define BOARD_ULFRCO_FREQUNCY 1000 /* Ultra low frequency oscillator */
/* HFCLK - High Frequency Clock
*
@ -110,9 +112,13 @@
* LFRCO is disabled from reset. The selection is configured using the LFA
* field in CMU_LFCLKSEL. The HFCORECLK/2 setting allows the Low Energy A
* Peripherals to be used as high-frequency peripherals.
*
* Use _CMU_LFCLKSEL_LFA_DISABLED to disable
* ULFRCO is a special case.
*/
#define BOARD_LFACLKSEL _CMU_LFCLKSEL_LFA_LFXO
#undef BOARD_LFACLK_ULFRCO
#define BOARD_LFACLK_FREQUENCY BOARD_LFXO_FREQUENCY
/* LFBCLK - Low Frequency B Clock
@ -123,9 +129,13 @@
* LFRCO is disabled from reset. The selection is configured using the LFB
* field in CMU_LFCLKSEL. The HFCORECLK/2 setting allows the Low Energy B
* Peripherals to be used as high-frequency peripherals.
*
* Use _CMU_LFCLKSEL_LFB_DISABLED to disable
* ULFRCO is a special case.
*/
#define BOARD_LFBCLKSEL _CMU_LFCLKSEL_LFB_LFXO
#undef BOARD_LFBCLK_ULFRCO
#define BOARD_LFBCLK_FREQUENCY BOARD_LFXO_FREQUENCY
/* PCNTnCLK - Pulse Counter n Clock